Those of you that are having problems with the albatros villas ie: water penatrating down the internal walls , basement flooding etc, you may like to have a look at where your solar tank and panel are situated on that roof area their should be an overflow , you shold check if the overflow is a real overflow ie: does the water escape from that roof area , as i poked an iron bar to see if it could go through and clunk ! the rendering on the other side is blocking the water hence this may be why your basement is being flooded as the water is travelling down the internal walls into your basement etc , we unblocked ours and it rained not too much though but our basement was dry , this is a 10 euro job that could save you time and money and heartache hope this info is of use to you.
ps let me know of your feedback on this issue ie: works doesnt work etc thanks
Brian